TradeCancel

message TradeCancel {
  string symbol = 1;
  string market_center = 2;
  string security_class = 3;
  string control_number = 4;
  string price = 5;
  uint32 size = 6;
  uint64 volume = 7;
  string trade_settlement = 8;
  string trade_code = 9;
  string ext_hour_sold_codes = 10;
  string sale_cond_codes = 11;
  int64 executed_at = 12;
  int64 tracking_id = 13;
}